Portable power hoist



Aug. 15, 1950 c. DALBECK PORTABLE POWER HoIsT 2 Sheets-Sheet Filed Feb.18, 1949 INVENTOR Clarence .Dalbec/r By J3 /Ir nes.

Aug. l5, 1950 c. DALBEcK PORTABLE POWER HOIST Filed Feb. 18, 1949Clarence Dalbeclf Attorney. l

Patented Aug. 15, 1950 x oFF-ics rommelig: POWER no'rsr;`

ciareanameck. Wakefield;

appresa-m Fsrnsnyfis, 194s, ser-rai N6. 'meer 1. claim.. V(c1. zia-Janinvention. relates; to materiail hamdlirrg: and; move p:n.tiicuiarlaY aportable power @nei ot the: obaects; or. this: mention. resides.' imthe: pronision of' a hoist; adapted. be mounted a'. truclg or' othertraversing vehicles sof as tiene disposed: arljanent'.y materials, to,"be' leaded-g. unloaded orfothenwisemuveda.

. 1Anotheir object of thisr invention. resides thea previsioni of. a4hoist. adapted tu bei mounted ore a motor Vvehicle and` operated by the.power.7 plantA thereof?M A. furthen obieict.` ottv invention resides:previsioni of: ai hoist adaptedi toi be: mountedi oma motor on other.typaof; land;v traversing; venitclefand operated-ibm amadacenapower:plant prete-f erab'lys carried the. vehicle:v

fr stillittmther object-of; this in-.ventiontresides imthe: particular?assemblage of. power transmitir ting/ means connecting, the powen planton the` vehicle to thelboonn operating; windlassi Aside from. theaafouesaid objects this: inten f ftion residesdnythe particularvconstruction. at ,ther mast; and assemblageV thereon ot. the? hoistingbooms: f Y

Y the: many# obaectss of', this. inventierr is. the. provision of.means? whereby ease in. botlr. loadingeagntlE out slack in. thehoisting: caf-ble for. tlzie;y succeeding.' load is; permitted.

In; ac/lditioni` tothe: foregoing objects this invention resides in theprovision of means whereby the materiallbeingiloadedacanibe held at anydegree above the ground or place from which it is being moved.

With these and other objects in view, this invention resides in certainnovel features of construction and arrangement of elements to bevhereinafter more particularly set forth in the specification,illustrated in the accompanying drawings and pointed out in the appendedclaims and, although this disclosure depicts my present conception ofthe invention, the right is reserved to resort to such changes inconstruction thereof as come within the spirit of the invention.

In the accompanying drawings forming a part Y of this application:

Fig. 1 is a side View of a truck showing the hoist mounted thereon.

Fig. 2is a plan View thereof.

Fig. 3 is a detailed longitudinal sectional view taken approximately online 3-3 of Fig. 2 showing the power take-off from the truck motor.

Fig. 4 is a detail perspective view of the mast and hoisting boommounted thereon.

Fig. 5 is a perspective view of a telescopic boom.

Fig. 6 is an enlarged cross sectional view taken approximately on line6-6 of Fig. 2.

Fig: 'l ist a1v diagrammatic view ofL the windlassil driving means. l f-'l the presenti illustrati"oni of this invention; theL letterv A.designates a;y conventional? trucl which, among otherwell-knownelements, cuir-'-i sists of a'- f'rame Fi and motor lvl'provided with a take-orf shaft Si having a suitable power trans-1mitting element W keyedi. thereto;

Securedi to the" frame F as by triangle plates 53 is a mast 6 consistingof spaced paralilel staif tionaryelower members 'li mer-ging" at theirupper end'sl into' divergihg members 8i hinged theretoiat: 8 and havingtheir: upper ends connected by al substantially rectangular plate 9.Sain*V plateais provided'l with holes HY adjacent its front cormnfsatoreceiver andi secure the upper' ends.' or cables Hi f which areadapted to have fiov o1t` other suitable braces securedk to: andextending:- t'ofthe front endszot' the frame F, thereby'V forming;rrieansi tok relieve strainy on the plates 5; and* obi/i2* ate'y thet'ernleneyx etr the mast'1 to bendforwardly undertl'ie weight ofheavyfloads. The plate 9' also provided witlir holes I2: adjacent itsrearcorners tov loosely accommodate* suitably shapediv Wings-- I3tl orthelike for` connection of laterallyl extending' bracing` cables; (inotshown'' thereto?" their* free end's ses# cured to stationary' pegs'- or4the like (not shown) orroppos-ite sides oi? the truck tolprevent itfronti turningfover underl certain loading conditi'on'sL- ,Y Secured asibyfwel'di-'ng or thel like betweenther converging hingeV members of' themast is across beainlill provided? with.v rearwardly extending earsfifhaving vertically' aiigne'dapertures;` |81 therein to receive a kingpintl?, bolt or the like which extends through a block I8 pivotallydisposed between said ears and pivotally supporting a hoisting boom I9at its outer end by a horizontally disposed bolt 2l] 0r the likeextending therethrough thus providing the boom with universal movementrelative to the mast.

Secured to the outer portion of the boom is a sheave 2l while secured tothe lower portion of said ears l5 is a second sheave 22 over which istrained a hoisting cable 23 having its inner portion wound on a windlass2li whose shaft 24 is journalled in bearings 25 secured to the lowerportions of the members 'i and its outer end provided with a materialengaging chain 25 or other suitable element whereby material can befastened for lifting and moving. Said shaft 2E has its ends extendingthrough holes in the triangular plates 5 and carries a large sprocketgear 26 keyed thereto and connected to a small sprocket gear 2l keyed toone of the laterally extending shafts 28 of a diierential mechanism 29by a chain 2l. Said diiierential mechanism is cooperate with the elementW thereon while the companionv lateral-shaft 3| of said diierentialmechanism is provided with a hydraulic brake 32 controlled by a valve 34which in con,-

junction with the controlled lever 33' of theemergency brake 33 on thewindlass andV clutch 34 control operation of the power transmittingmeans from the vehicle motor to therhoisting cable. The aforesaidhydraulic brake, when applied to the shaft 3|, permits free vrotation ofthe opposite or companion shaft to operate the windlass 2, whiletheemergency brake enables the attendant to hold the load atany positionabove its support whereas the clutch automatically prevents retroactionof the windlass while lifting a load and also permits itto quicklygravitate when released.

Secured `to the outer portionof the boom is av cable 35 provided with achain 36 at its inner end adapted to slidably Yextend through aring 3 1,on the plate and lock the boom I9 at elected angles to the mast.V

In order to retain rigidity of the housing H of the differentialmechanism, the outer ends thereof are secured to the plates 5.

The upper members 3 of the mast are hingedly connected to the lowermembers l thereof and secured in upright operative position by extendinga, bolt 8 through aligned holes Vin opposed cross bars "i" and '1secured to adjacent endsof said members and, in order to reduce theheight of the mast so it will pass underoverheadobf structions such astrees, bridges and the like while the vehicle is travelling alonghighways,

the Vbolt VS is removed fromsaid crossbarsand the upper members swungonA the cabof the vehicle and secured thereonby any well known fasteningmeans.

In Fig. of the drawings, a modified form of boom is shown, the sameconsisting of telescopic members C and D locked together in its adjustedpositions by a bolt E or othersuitable elements.

Rotation of said drive shaftof thedifferential mechanism is Vcontrolledby the usual shift lever clutch (not shown).

of the conventional transmission l ora, suitable Having thus describedmy invention, what I claim and desire to protect by Letters Patent is:

The combination with a, motor operated vehicle including a powertake-off, a mast including stationary lower members rigidly secured tothe frame of the motor vehicle, converging upper members hinged t0 theupper ends of said stationary members, a stationary cross bar secured tos'aidfflower'membersz-f tlie mast, across bar secured'to' the uppermembersY of the mast be-i low their hinges, a fastening element securingsaid upper cross bars together to retain said upper members in operativeposition, substantially triangular plates securing said lower members ofthe mast to the frame of the vehicle, a substantially rectangular platesecuring the upper ends of the upper members adjacent one another andhaving a series of holes in its corners, a cross beam secured betweenthe convergingv upper members of the mast, rearwardly extending earssecured to the cross beam and hav# ing vertically.. aligned holestherein, forwardly extending cables ,connecting the .rectangular plateto the front portions of the vehicle frame, ablock disposed between thevears of the cross beam, a vertically fdisposedpivotal Vpin securing theblock between the ears, aboorn pivoted on a horizontal axis to theouterend ofthe block, a, sheave disposed on the outer end-.ofthe boom. asheave secured to said ears, a brace cable in-A cluding a chainConnected to the 4outer end Yof the boom andadjustablyv connected to.the vrectangular plate, means on said rectangular plate. adjustablyretaining thechain therein, a windlass including an emergency .brakejournalled on. the lower portion of sai-dlower members of the mast, ahoisting cable woundl around `the wind` lass at its inner end,af-material-ffastening chain on the outer end of` the aforesaid cable, adiierential mechanism rigidly secured tothe-triangular plates andconnected tofsaid take-off of the motor, a brake on one drive shaft ofthediier-V ential mechanism, 'a sprocket gear keyed to-'one end of theshaft ofthe windlass, a sprocketgear keyed to one of -the 'driveshafts/of the differential mechanisrma chain connectingsaid sprocketgears, and a .clutch on the shaft ofthe windlass.v

-- f A -0LARENCE DALBECK;

` `No references. cited. y

